Transfer mechanism for the forward and backward counting device of calculating-machines.



- 0. WOLTER.

TRANSFER mncmmsm FOB. THE FORWARD AND BAOKWABD COUNTING DEVICE 0FCALCULATING MACHINES.

APPLICATION IILED SEPT. 7, 1910.

1,005,397. Pate td 001,110; 1911.-

UNITED sT rEs PATENT oFF cE.

CARL WOLTER, OF RIXDORF, NEAR BERLIN, GERMANY.

TRANSFER MECHANISM FOR THE FORWARD AND BACKWARD COUNTING DEVICECALCULATING-MACHINES. i I

Application filed September 7, 1910. Serial No. 580,791.

To all whom it may concern:

Be it known that I, CARL WOLTER, a subject of the King of Prussia,German Emperor, residing at Rixdorf, near Berlin, Germany, have inventedcertain new and useful Improvements in Transfer Mechanism for theForward and Backward Counting Device of Calculating-Machines, of whichthe following is a specification.

This invention relates to the transfer mechanism for the counting deviceof calculating machines.

The mechanism according to this invention is of very simpleconstruction.

It consists essentially of a sliding plate with a central opening andwith two teeth, said sliding plate being controlled by a pull string.When the pulling direction is varied, owing to the lifting of a pawloperated from the counting device, the next numeral wheel is turned forone tooth in the one or in the other direction.

The improved mechanism is shown by way of example in the accompanyingdrawings.

Figure 1 is a side elevation of the mechanism, the parts which are notabsolutely required to illustrate the invention, being omitted. Fig. 2shows the principal parts of the mechanism in top view. Figs. 3, 4 and 5represent the mechanism in different positions.

The transfer wheel 1 meshes in the well known manner with a spur wheel 2which meshes in its turn with another spur wheel 3 serving as numeralwheel. The sliding plate 4 has at its end which is turned toward saidspur-wheels two teeth 5, 6, a curved slot 7 with notch 8, a triangularopening 9, an oblongslot 10 and a curved extension 11. A pawl 12 of alever which is pivotally mounted at 13 and which stands under theinfluence of a spring 14 normally engaged with said notch 8. The lower'end of lever 15 presents an angular projection 16, designed to cooperatewith the roofshaped projection 17 of the spur wheel 2. The plate 4 isinsured in its position by means of said pawl 12 and of a roller 19engaging with the oblong slot 10, so that, if said pawl is withdrawn theplate can swing around the bolt 19. The oscillating movement of theplate 4 is limited by the roller 18 which engages with the triangularopening 9 of the plate. As can' be seen from Fig. 2 a similar mechanismis arranged between every two numeral or counting wheels.

The ends of the juxtaposed lever plates 4 are each connected with the'rev'oluble y ke 21, by means of a spiral spring 20. A toothed wheel 22is keyed upon the shaft of said yoke 21 and meshes with a toothed seg-"ment 23 of a hand lever 25 adapted to swing around its pivot 24. Thishand lever 25 serves for moving the yoke 21 to one of the threepositions a, b or 0 (Fig. 1) in order to modify the direction in whichthe pulling strain of the springs 20 is exerted upon the plates 4. A

Rollers 27 carried by a rod 26 abut against the curved extension 11 ofthe plates 4. This rod 26 carries at its free end a roller 28 adapted tocome in contact with the slide which is not shown in the drawing. Thisslide of the calculating machine acts upon the roller 28 in thedirection of the arrow (Fig. 1), the rod, after having been pushed inthis direction, being pulled back by the spring 29.

The mechanism operates as follows :For the execution of addingoperations the yoke 21 is in the position shown in Figs. 1, 3 and 4.When the mechanism is in the position Fig. 4 the rod 26 driven towardthe left by the slide pushes with its roller 27 against the curvedextension 11 and lifts the plate 4 from the position (Fig. 4) into theposition (Fig. 1) so that the pawl 12 engages with the notch '8 of theplate maintainin the same in this position. The rod 26 %eing hereuponpulled back by its spring 29 the plate is free to move to the rightunder the influence of the pull spring 20until the roller 19 comes incontact with the left hand end of the oblong slot 10. The mechanism isin the position shown in Fig. 3, the teeth 5 and 6 and the angularprojection 16 being situated quitec'lose to the counting wheels. Whenthe toothed wheel 2 has revolved so'gthat its triangular or roofshapednipple 17 comes in contact with the angular projection 16 it actsuponsaid projection and pushes the lever 15 back so that it oscillates;the pawl 12 is withdrawn from the notch 8. The plate is thus releasedand can swing .under the action of the spring 20 around the roller 19 sothat the tooth 5 engages with the next higher toothed wheel 2 andrevolves the same and consequently its numeral wheel 3 Patented ()ct.10,1911.

for the space of one tooth. The mechanism has again assumed thePOSltlOII F g. 4, from which it is brought to the positlon F g. 3 by theaction of the driving slide as has been hereinbeforedescribed. Forsubtractions the yoke 21 has to be brought into the position 0 which isefiected by means of the hand lever 25, so that the pull spring 20 actsin opposite direction upon the plate 4 when the same is being released;the mechanism is thus brought to the position Fig. 5 where the tooth 6acts upon the toothed Wheel 2 turning the same in opposite direction;otherwise the operation is exactly the same as has been hereinbeforedescribed.

I claim 1. An improved transfer mechanism for calculating machinesadapted to operate for additions or for subtractions, comprising incombination with the toothed driving wheel for the numeral wheel, aslidable plate having a curved slot with a notch, a triangular openingand an oblong slot, two oppositely directed teeth at the front end ofsaid plate, a pawl lever pivotally mounted behind said plate, an angularprojection of said lever located between said teeth, the nipple of thedriving wheel of the counting mechanism adapted to act upon said angularprojection of said lever, the pawl of the lever engaging with said notchof the plate and releasing the plate when the nipple acts upon saidprojection, a cam like extension of the plate having a curved surface, asliding rod, a roller adapted to act upon said curved surface, an axlein said oblong slot of the plate serving as pivot, a yoke adapted toassume calculating machines adapted-to operate for additions or forsubtractions, comprising in combination with the toothed driving Wheelfor the numeral wheel, a slidable plate having-a curved slot with anotch, a triangular opening and an oblong slot, two oppositely directedteeth at the front end of said plate, an angular projection of saidlever located between said teeth, the nipple of the driving wheel of thecounting mechanism adapted to act upon said angular projection of said1ever, the pawl of the lever engaging with said notch of the plate andreleasing the plate when the nipple acts upon said projection, means forshifting said plate, a yoke adapted to assume two opposite extremepositions, and a hand-lever for bringing said yoke to the one or to theother, the addingor the subtractionposition, and a pull spring fixedwith one end to said yoke and with the other end to said plate,substantially as described and shown and for the purpose set forth.

In witness whereof I have hereunto set my hand in the presence of twowitnesses. CARL WOLTER. Witnesses:

WOLDEMAR HAUPT, ARTHUR ScHRoEDER.

